She says one possibility is a decrease in the number of school nurses during the period they studied.

VOA: special.2009.08.06

He says a decrease in the use of salt and unhealthful fats probably also helped.

VOA: special.2011.02.15

And studies have found that it helps protect against a decrease in mental ability.

VOA: special.2009.03.24

"Women who had their ovaries removed had a decrease in the risk of breast cancer, a decrease in the risk of ovarian cancer and,in addition,they were less likely to die of breast cancer, less likely to die of ovarian cancer and also had an improvement in their overall survival."

VOA: special.2010.09.22

The expanding U.S.advisory role coincides with a decrease in combat operations in the months before U.S.troops are due to withdraw by the end of December 2011.

VOA: standard.2009.07.28

Reports indicate there's a decrease in the risk of in-hospital deaths.

VOA: standard.2010.03.07

In other new research, a study has found that circumcision does not decrease the risk that H.I.V.positive men will infect women.

VOA: special.2009.07.29

The researchers found a major decrease in unwanted chemicals by preparing the meat with spice and herb marinades.

VOA: special.2009.05.19

The electronics industry is hoping a new crop of products will help it recover from an eight percent decrease in sales last year.

VOA: special.2010.01.26

They found a major decrease in unwanted chemicals by preparing the meat with spice and herb marinades.

VOA: special.2010.06.01

It says there has been a major decrease in AIDS deaths in many countries as a result.

VOA: special.2010.03.10

The Millennium Development Goals for two thousand fifteen call for a fifty percent decrease in the number of people without safe drinking water and basic sanitation.

VOA: special.2010.04.05